Simultaneous removal of Na, Ca, K and Mg from synthetic brine and seawater using Fe2O3-SiO2 mixed oxide nanostructures: kinetics

Ramutshatsha, Denga; Ngila, Jane Catherine; Ndungu, Patrick; Nomngongo, Philiswa N.

doi:10.5004/dwt.2018.21919

Cited by 8 publications

(8 citation statements)

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“…With regard to the effective removal of metals from water, various techniques such as filtration [7], ion exchange [8], reverse osmosis [9], chemical precipitation [10] (Int, 2019), and adsorption [11] were previously explored. Amongst these techniques, adsorption is highly favored due to its potential to remove both organic and inorganic pollutants even at a trace level [12].…”

Section: Introductionmentioning

confidence: 99%

Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Ramutshatsha-Makhwedzha

Mbaya

Mavhungu

2022

Materials

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This study was aimed at evaluating the adsorption capacity of novel banana peel activated carbon (BPAC) modified with Al3O2@chitosan for the removal of cadmium (Cd2+) and lead (Pb2+) from wastewater. Characterization techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transformed infrared (FTIR) spectroscopy, and Brunauer–Emmett–Teller analysis confirmed the synthesized BPAC@Al3O2@chitosan composite material. The univariate approach was used to study the influence of different experimental parameters (such as adsorbent mass, sample pH, and contact time) that affects simultaneous removal of Cd2+ and Pb2+ ions. Kinetic results showed that adsorption favored the pseudo-second-order kinetic model, whereas the adsorption of Cd2+ and Pb2+ was best described by the Langmuir model and the adsorption capacity for Cd2+ and Pb2+ was 46.9 mg g−1 and 57.1 mg g−1, respectively, for monolayer adsorption. It was shown the BPAC composite can be re-used until the third cycle of adsorption–desorption (% Re > 80). Based on the obtained results, it can be concluded that the prepared BPAC@Al3O2@chitosan composite material is cost effective, as it is generated from waste banana peels and can be re-used. In addition, the prepared material was able to remove Cd2+ and Pb2+ up to 99.9%.

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Section: Introductionmentioning

confidence: 99%

Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Ramutshatsha-Makhwedzha

Mbaya

Mavhungu

2022

Materials

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“…Batch adsorption methodology is usually optimized by means of monitoring one factor at time (OFAT) [26,27]. However, the limitation of this optimization approach is that it requires significant large number of experiments to performed for each factor, thus leading increasing consumption of reagent and materials [26,27]. Moreover, the OFAT approach is time consuming the interaction effects among the experimental parameters are not considered [26,27].…”

Section: Introductionmentioning

confidence: 99%

“…However, the limitation of this optimization approach is that it requires significant large number of experiments to performed for each factor, thus leading increasing consumption of reagent and materials [26,27]. Moreover, the OFAT approach is time consuming the interaction effects among the experimental parameters are not considered [26,27]. This can be overcome by employing multivariate approach such as response surface methodology (RSM).…”

Section: Introductionmentioning

confidence: 99%

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Application of Response Surface Methodology and Desirability Function in the Optimization of Adsorptive Remediation of Arsenic from Acid Mine Drainage Using Magnetic Nanocomposite: Equilibrium Studies and Application to Real Samples

2019

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A magnetic multi-walled carbon nanotube/zeolite nanocomposite was applied for the adsorption and removal of arsenic ions in simulated and real acid mine drainage samples. The adsorption mechanism was investigated using two-parameter (Langmuir, Freundlich, Temkin) and three-parameter (Redlich–Peterson, and Sips) isotherm models. This was done in order to determine the characteristic parameters of the adsorptive removal process. The results showed that the removal process was described by both mono- and multilayer adsorptions. Adsorption studies demonstrated that a multi-walled carbon nanotube/zeolite nanocomposite could efficiently remove arsenic in simulated samples within 35 min. Based on the Langmuir isotherm, the adsorption capacity for arsenic was found to be 28 mg g−1. The nanocomposite was easily separated from the sample solution using an external magnet and the regeneration was achieved by washing the adsorbent with 0.05 mol L−1 hydrochloric acid solution. Moreover, the nanoadsorbent was reusable for at least 10 cycles of adsorption-desorption with no significant decrease in the adsorption capacity. The nanoadsorbent was also used for the arsenic removal from acid mine drainage. Overall, the adsorbent displayed excellent reusability and stability; thus, they are promising nanoadsorbents for the removal of arsenic from acid mine drainage.

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“…In addition, an inert silica coating on the surface of magnetite nanoparticles prevent their aggregation in liquid substances or matrix [35]. Therefore, many research studies have applied functionalized silica as an adsorbent in the analysis of various metals and compounds [36][37][38]. However, it has been reported that inorganic adsorbents tend to cause operational problems such as clogging of filter membranes [39].…”

Section: Introductionmentioning

confidence: 99%

Ultrasound Assisted Adsorptive Removal of Cr, Cu, Al, Ba, Zn, Ni, Mn, Co and Ti from Seawater Using Fe2O3-SiO2-PAN Nanocomposite: Equilibrium Kinetics

Ramutshatsha-Makhwedzha

Ngila

Ndungu

et al. 2019

JMSE

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This work reports the preparation and application of Fe2O3-SiO2-PAN nanocomposite for the removal of Cr3+, Cu2+, Al3+, Ba2+, Zn2+, Ni2+, Mn2+, Co2+, and Ti3+ from seawater. X-ray diffraction (XRD), scanning electron microscope/energy dispersive X-ray spectroscopy (SEM/EDS), transmission electron microscope (TEM), and Brunauer-Emmett-Teller (BET) characterized the synthesized composite. The following experimental parameters (Extraction time, adsorbent mass and pH) affecting the removal of major and trace metals were optimized using response surface methodology (RSM). The applicability of the RSM model was verified by performing the confirmation experiment using the optimal condition and the removal efficiency ranged from 90% to 97%, implying that the model was valid. The adsorption kinetic data was described by the pseudo-second order model. The applicability of the materials was tested on real seawater samples (initial concentration ranging from 0.270–203 µg L−1) and the results showed satisfactory percentage efficiency removal that range from 98% to 99.9%. The maximum adsorption capacities were found to be 4.36, 7.20, 2.23, 6.60, 5.06, 2.60, 6.79, 6.65 and 3.00 mg g−1, for Cr3+, Cu2+, Al3+, Ba2+, Zn2+, Ni2+, Mn2+, Co2+, and Ti4+, respectively.

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Simultaneous removal of Na, Ca, K and Mg from synthetic brine and seawater using Fe2O3-SiO2 mixed oxide nanostructures: kinetics

Cited by 8 publications

References 0 publications

Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Application of Activated Carbon Banana Peel Coated with Al2O3-Chitosan for the Adsorptive Removal of Lead and Cadmium from Wastewater

Application of Response Surface Methodology and Desirability Function in the Optimization of Adsorptive Remediation of Arsenic from Acid Mine Drainage Using Magnetic Nanocomposite: Equilibrium Studies and Application to Real Samples

Ultrasound Assisted Adsorptive Removal of Cr, Cu, Al, Ba, Zn, Ni, Mn, Co and Ti from Seawater Using Fe2O3-SiO2-PAN Nanocomposite: Equilibrium Kinetics

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